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Heterogeneous and Homogeneous mixtures Objectives: To understand definition of mixture and types of mixtures, i.e Heterogeneous and Homogeneous mixtures Matter is, made up of small particles (solid, liquid or gas). These small particles make up substances that can be pure substances such as Mercury, Iron, gold biscuits or mixtures such as air we breathe, food we eat and water we drink. A substance is a kind of matter that cannot be separated into other kind of matter by any physical process.…

Answer: Question 1 (a) Energy Energy Energy Band gap Band gap 0 0 0 (i) Insulator (ii) Semiconductor (iii) Conductor Diagram 1: The energy band The differences between insulator, semiconductor and conductor. Insulator Semiconductor Conductor It has a large band…

The purpose of the lab was to determine which unknown substances were ionic compounds, if any, using 4 different methods. This lab was to determine which of the three unknown substances (X, Y & Z) are ionic compounds and which are not ionic compounds. In conclusion unknown Y is an ionic compound and unknown X and Z are not ionic compounds. In order for a substance to be an ionic compound it must have a high melting point, it must be brittle, it must be soluble in water, it can not conduct…

PE2008 – Phase Equilibrium Thermodynamics Assignment Kayleigh Tobin – 114378781 Separation of Water and Pyridine by Distillation.________________________ (1) Water – H2O • Density: 1,000 kg/m³ • Boiling point: 100 °C • Molar mass: 18.01528 g/mol • Melting point: 0 °C • Formula: H2O • IUPAC ID: Water, Oxidane Water is the most abundant compound on the planet’s surface. Water exists naturally in a liquid, solid and gaseous form. The liquid phase of water is the most common. The solid phase…

Figure 1a. Size of nano curcumin. Image of curcumin nanoparticles taken with Transmission electron microscope (JOEL 2100F) showing particles having size distribution of 59.9 nm to 198 nm ( average size of 160 nm). Figure 1b. Bioavailability of nano curcumin. Mice were given I.P injections with curcumin/nanocurcumin (vehicle: PBS containing 10% ethanol) per mice at 100 mg/kg body weight and then bled at different time points via retro-orbital puncture and blood collected from each…

Free radicals are molecules that have at least one unpaired electron. They are typically very reactive, due to their odd number of electrons. These molecules tend to try and gain or lose electrons so their highest energy levels can be filled. They will bond with other compounds in the body, sometimes combining with them, or even taking parts of intact molecules, resulting in even more free radicals (Walling). Free radicals can be formed by natural body processes, such as metabolism. They…

The atomic radius will slowly decrease as you move across a period on the periodic table; this is caused by the addition of protons found in the nuclei of the elements. For every new proton being added, several electrons will also be included into this process by joining the identical energy level (ultimately accounting for one electron per element in said period). The electrons then attract the protons, whilst failing to shield from or repulse this attraction. Given the above information, the…

Helium was discovered by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve at 1895 in England and Sweden. A French astronomer Janssen first obtained evidence for the existence of helium during the solar eclipse of 1868 in India. For many years helium was known as an element that might exist on the sun but unknown on the Earth. Sir William Ramsay discovered helium after treating a uranium mineral. Lockyer and Professor Edward Frankland suggested the name helium. A sample of…

Water quality of Freshwater Creek Abstract: This report will be detailing the results found after testing three different water quality parameters on water samples taken at Freshwater Creek and comparing them with past results. It will determine if Freshwater Creek is, has been or is becoming polluted. The three tested parameters were dissolved oxygen, biochemical oxygen demand and ammonia. What was found is that the results for all three tests fitted within the recommended guidelines for…

The element that I choose for this project is called Strontium. Strontium is a chemical element with the symbol (Sr) and it has atomic number of 38. It is an alkaline earth metal, and is a soft white yellowish metallic element which has highly reactivity chemically. It’s properties are mostly intermediate between aand similar to those of its group neighbors calcium and barium. When it is exposed to air, the metal forms a dark oxide layer. Strontium has 38 protons, 50 neutrons, and 38 electrons.…